I can't imagine how creating a BLU Trust would be any harder than making any other mage Trust (not to mention they've already created plenty of Trusts with unique models and weapon skills so it's not like they have a history of being lazy with them), so I think they're actually being serious with that lore explanation. I guess you could make the argument that pretty much every Trust so far is at least a friendly character, except for Balamor, but that guy's pretty unhinged so maybe he considers you a friend in the sense that you're the only guy he has fun consistently screwing with.
I can see most of the Blue Mages being mindless drones or whatever but Raubahn at least seems like he has some level of respect for you after you beat him in the Blue Mage Genkai quest. Also I guess he's the exception to the whole "Blue Mages mostly stick around in Aht Urhgan thing" given how he's their leader and all. Don't know how useful the guy would be if he starts spamming Eyes on Me every 20 seconds though.
Also IIRC Razfahd was not a Blue Mage, but I might be remembering wrong.
XI Wiki


